ScienceHideout
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Diammine Silver Complexes
So, I prepared Tollen's reagent- but not in the typical way. Instead of adding sodium hydroxide to get the oxide and dissolve it in NH3, I just left
out the step and added, dripwise, ammonium hydroxide to silver nitrate until it turned brown, then clear.
What I need to figure out- is the complex I made diammine silver nitrate, or diammine silver hydroxide? Is there a chemical test for this?
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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blogfast25
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Quote: Originally posted by ScienceHideout  | | What I need to figure out- is the complex I made diammine silver nitrate, or diammine silver hydroxide? Is there a chemical test for this?
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Firstly, you understand that such solutions are inherently unstable, especially concentrated ones?
I refer (among others) to an accident that occurred in my lab using such solutions:
http://www.sciencemadness.org/talk/viewthread.php?tid=32782#...
"I made diammine silver nitrate, or diammine silver hydroxide?"
You've made neither and both. The silver diammine complex, Ag(NH<sub>3</sub> <sub>2</sub><sup>+</sup>(aq) is a solvated complex ion. In your solution you have also nitrate and hydroxide ions
but that makes it neither diammine silver nitrate, nor diammine silver hydroxide as everything is in solution. It's just a soup of these ions in
water.
Whatever you do, do not try and evaporate your solution to isolate either the hydroxide of nitrate because it WILL detonate, because
of explosive silver nitride (A<sub>3</sub>N) formation.
DON'T keep your preparation for more than 24 h. Also dispose of spent solutions (used for silver mirroring) within 24 h.
Be careful.
[Edited on 11-10-2014 by blogfast25]
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ScienceHideout
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Blogfast,
Thanks so much for response. Basically, the reason why asked is because I am making silver colloids, and I couldn't figure out the stoiciometry for
the life of me after doing a titration. It just slipped my mind, that the nitrate and hydroxide are spectator ions. It all makes sense now, my
hero! Thanks So much, and thanks for your safety concerns as well. I have been aware of the fulmination issues, and I always reduce my leftovers
before I exit the lab. Thank you, thank you thank you. .. 
Dean
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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ScienceHideout
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Oops, I am using this website on my phone and some reason it posted twice. .. sorry about this. Moderators, you may delete this message if you so
desire. 
[Edited on 11-10-2014 by ScienceHideout]
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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